Are there nonstop flights from Sapporo (CTS) to Ulaanbaatar (UBN)?

No. The fastest connection is via Dalian, about 4h 51m of total flying time.

What is the fastest connection from Sapporo (CTS) to Ulaanbaatar (UBN)?

via Dalian ≈ 4h 51m, via Seoul ≈ 4h 58m, via Cheongju ≈ 5h 5m (estimated flying time, excluding layovers).

from 17,500 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

New Chitose Airport (CTS) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・2,760 km

No nonstop flights. The fastest connection is via Dalian (DLC), about 4h 51m of flying time (layover not included).

With milesANA 17,500 miles+ (via NRT)JAL 23,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.